Steam boiler



Feb. 13, 1934. J. E. BLACK 1,946,666

STEAM- BOILER I Original Fiied July 2, 1927 2 She ets-Sheet l INVENTOR ,4 ATTORNEYS J. E. BLACK STEAM BOILER Feb. 13,1934.

Original Filed July 2, 1927 2 Sheets-Sheet 2 mvEg oR 'ATTORNEY5 Patented Feb. 13, 1934 UNITED STATES 1,946,666 STEAM Bomm John E. Black, Rumson, N. 1., assignor, by mesne assignments, to Fuller Lehigh Company, a corporation of Delaware Application July 2, 1927, Serial No. 202,999

Renewed April 24, 1931 14 Claims.

My invention more particularly relates to a steam boiler comprising water tubes lying against or mounted adjacent to a furnace wall.

My invention will best be understood by reference to the accompanying drawings, in which I have illustrated one embodiment of my invention and in which Fig. 1 is a longitudinal section through a steam boiler, and Fig. 2 is a cross section taken on the line 22 of Fig. 1. A

Like reference characters indicate like parts throughout the drawings.

Referring now to the drawings, I have illustrated my invention in conjunction with a boiler of the Stirling type comprising three upper steam and boiler drums 10, 11 and 12, and a lower mud drum 13 connected to the upper drums by banks of tubes 14, 15 and 16, respectively. The gases are directed along and across the tubes of the boiler by baffles 17, 18, 19 and 20 20 to an outlet flue, not illustrated, in a known manner, a superheater indicated generally at 201 being located between the banks of tubes 14 and 15.

The steam and water drums are connected by steam circulators 21 and 22 in the usual manner, and the drums 10 and 11 are connected by water circulators 23. A portion of the tubes 24 of the rear bank 16 are preferably bent forwardlyas illustrated in Fig. 1, and are connected to the middle drum.

The front wall of the setting is illustrated generally at 25 and is shown as comprising an upper section 251 carried by I-beams 252, and a lower section 253 which provides a sliding joint with the section 251.

The rear setting of the boiler is illustrated generally at 26, and in front thereof is a wall 27, water cooling tubes 28 lying against said wall or being located adjacent thereto, and which may, in fact, form a part of the wall. The lower ends of the .tubes 28 are connected to a water chamber or header 29, and the upper endsto a water chamber or header 30, both of which, in the form shown, extend transversely of the boiler. The upper portion of the wall 27 is preferably provided with an extension or bafiie 271 which is carried up into engagement with the lower drum 13, and preferably forms a sliding joint as at 272 with the wall 27. The water chamber or header 29 is preferably supported by saddles or brackets 292.

Water is led from the lower drum 13 to the water chamber or header 29 by tubes 31, the upper portions of which are preferably curved as illustrated at 311. The water chamber or header 30 is connected to the lower water chamher or header 29 by recirculation pipes 32, so that circulation takes place between the water chambers or headers 29 and 30, the water passing upwardly through the cooling tubes 28 and 0 downwardly through the tubes 32. From the upper water chamber or header 30 the water is conducted upwardly through pipe connections 33 to the front steam and water drum 10, the connection 33 preferably passing outside of the set- 5 ting as illustrated in Fig. 2. The curved portions of the pipes 311 render the same flexible,

so that they are free to rise and fall under relative expansion and contraction which take place between the boiler and the setting, and 7 without injuring the pipe or creating leakage between their connections to the mud drum and the header. Preferably, these pipes are made up of sections joined together as at 312. In the form shown, the pipes 31 pass through openings 34 in the rear setting 26, a sleeve or gasket 35 of yielding material, such as asbestos, preferably surrounding said pipes where they pass through said opening. I

In Fig. 2, I have illustrated one form of the side wall indicated generally at 36, and, in the form illustrated, comprising a lower section 361 and an upper section 362. It will, of course, be understood that the other side wall of the furnace may be similar to that illustrated in Fig. 2. The lower section 361 of the side wall preferably comprises water tubes 37 which are located adjacent to the side wall and are here shown as being located within and forming a part of the lower section of the side wall. The lower ends of the tubes 37 are connected to water chambers or headers 38, and the upper ends thereof to Water chambers or headers 39 which are preferably located adjacent the setting.

Water is supplied to the lower Water chamber or header 38 by means of tubes 40, connected at'their upper ends to the lower drum 13 and preferably curved and passing through openings in the wall of the setting, as illustrated. These tubes are bent to enter the lower headers 38, preferably near the ends thereof, from which the water passes upwardly through the side wall cooling tubes 37 to the water chamber or header 39.

The water chamber or header 39 is preferably connected to the steam and water drum 10 by a plurality, of tubes, or water circulators 41, the lower ends of which are connected to the header through openings spaced therealong, the

tubes preferably entering the steam and water drum in a circumferential row of openings.

Preferably the tubes 41 are curved as illustrated in Fig. 1, so that they are fairly evenly spaced along the upper section 362 of the side wall, against which they preferably lie and which they serve to cool. Furthermore, by curving the tubes in the manner illustrated, they are caused to enter the steam and water drum 10, not only in a circumferential row of openings, but enter the same radially, thereby affording maximum strength to the drum and the connections between the drum and the tubes.

It will be noted that the tubes 41 for the major portion of their length are exposed to the heat of the furnace, thereby increasing the heat absorption and the circulation of the water therein. At the same time, the tubes maintain the upper section 362 of the side wall, against which the tubes lie, comparatively cool.

The operation of the boiler embodying my invention, will readily be understood from the foregoing description and is as follows:

There is, of course, the usual circulation that takes place in a Stirling boiler. Additionally, water passes downwardly from the mud drum 13 through the tubes 31 and 40 to the lower rear water chamber or header 29 and the lower side water chambers .or headers 38, respectively. Between the water chambers or headers 29 and 30, the water circulates through the tubes 28 and 32, and from the water chamber or header 30 the steam and water is led through the pipes 33 to the steam and water drum 10. The water from the lower side water chamber or header 38 passes upwardly through the side wall cooling tubes 37 to the water chamber or header 39, and from thence passes through the side wall cooling tubes 41 to the steam and water drum 10.

I claim:

1. In a steam boiler and its setting, a furnace wall, an upper steam and water drum, a lower horizontally extending water chamber and a second horizontally extending water chamber intermediate said lower water chamber and said steam and water drum, water tubes joining said water chambers and located adjacent said furnace wall, and upwardly extending water circulatory tubes connected to and spaced along said upper header and connected to said steam and water drum in a circumferential row.

2. In a steam boiler and its setting, a furnace wall, an upper steam and water drum, a lower horizontally extending water chamber and a second horizontally extending water chamber intermediate said lower water chamber and said steam and water drum, water tubes joining said water chambers ,and located adjacent said furnace wall, and upwardly extending water circulatory tubes connected to and spaced along said upper header and connected to said steam and water drum in a circumferential row, said last named tubes being located adjacent to said furnace wall.

3. In a steam boiler and its setting, a vertically extending furnace wall, an upper steam and water drum and a lower mud drum connected by a bank of Water tubes, a water chamber located below said mud drum, tubes connected to said water chamber and located adjacent said furnace wall, a wall forming a part of the furnace setting, and curved flexible water tubes connecting said mud drum to said water chamber and extending through said last named wall.

4. In a steam boiler and its setting, a vertically extending furnace wall, an upper steam and water drum and a lower mud drum connected by a bank of water tubes, a water chamber located below said mud drum, tubes connected to said water chamber and located adjacent said furnace wall, a wall forminga part of the furnace setting, and curved flexible water tubes connecting said mud drum to said water chamber and spaced therealong and extending through said last named wall.

5. In a steam boiler and its setting, a furnace wall, an upper steam and water drum and a lower mud drum connected by a bank of water tubes, a circulatory system for said boiler including said tubes, upper and lower water chambers located below said mud drum, water cooling tubes connecting said water chambers and located adjacent said furnace wall, other tubes connecting said water chambers and located at the rear of said wall whereby a circulation may take place through the two sets of tubes connecting said water chambers, a connection be tween said upper water chamber and said upper steam and water drum, and connections between said circulatory system and said lower water chamber.

6. In combination, a steam boiler comprising an upper steam and water drum and a circula-' tory system connected thereto, a furnace for said boiler, wall cooling tubes located adjacent to a wall of said furnace, upper and lower headers to which the ends of said tubes are connected, water circulators connected and distributed along said upper header and connected to said steam and water drum in a circumferential row, and means for conducting water from said circulatory system to said lower header.

7. In combination, a steam boiler comprising an upper steam and water drum and a circulatory system connected thereto, a furnace for said boiler, wall cooling tubes located adjacent to a wall of said furnace, upper and lower headers to which the ends of said tubes are connected, water circulators connected and distributed along said upper header and connected to said steam and water drum in a circumferential row, and means for conducting water from said circulatory system to said lower header. there being a less number of said water circulators than of said wall cooling tubes.

8. In combination, a steam boiler canprlsing an upper steam and water drum and B circulatory system connected thereto, a furnace. a row of wall cooling tubes located adjacent to a wall of said furnace, upper and lower headers tp which the ends of the tubes of said row are connected, water circulators connected to and distributed along said upper header and connected to said steam and water drum in a single circumferential row, and means for conducting water from said circulatory system to said lower header, there being a less number of said water circulators than of said wall cooling tubes.

9. In combination, a furnace wall section luving closely spaced water cooling tubes therein. an upper header and a lower header to which said tubes are connected, a furnace wall section above said first named section, water eocliag tubes in said second named section spaced apart farther than those in said first named section and connected to said upper header at their lower ends, and a drum to which the upper, ends of said last-named tubes are connected.

10. In combination, a furnace wall section having closely spaced water cooling tubes therein, an upper header and a lower header to which said tubes are connected, a furnace wall section above said first named section, a smaller number of cooling tubes in said second named section having their lower ends connected to said upper header and a drum to which the upper ends of said last-named tubes are connected.

11. In combination, a furnace wall section having closely spaced water cooling tubes therein, an upper header and a lower header to which said tubes are connected, a furnace wall section above said first named section, a smaller number of cooling tubes in said second named section having their lower ends connected to said upper header, a boiler, said boiler having a drum to which the upper ends of said tubes are connected and connections from said lower header to the water circulation system of said boiler.

12. In combination, a water tube boiler having a steam and water drum, water tubes and a furnace below said drum, a furnace wall section comprising water cooling tubes and refractory material on said tubes, an upper header and a lower header to which said water cooling tubes are connected, a refractory furnace wall section above said first named section and below said drum, water cooling tubes associated with said second named section and connecting said upper header to said steam and water drum,

and means to conduct boiler water to said lower header. r g

13. In combination, a water tube boiler having a steam and water drum, water tubes and a furnace below said drum, a furnace wall section comprising a row of water cooling tubes that are straight for the major portion of their lengths and refractory material on said tubes, an upper header and a lower header to which said water cooling tubes are connected, a refractory furnace wall section above saidfirst named section and below said drum, water cooling tubes associated with said second named section and connecting said upper header to said steam and water drum, and means to conduct boiler water to said lower header.

14. In combination, a water tube boiler having a steam and water drum, water tubes and a furnace below said drum, a lower header, a furnace wall, water cooling tubes along said wall connected to said lower header, connections from the upper ends of the last named tubes to said drum, said last named connections comnus 

